... bymechlor-ethamineInsertion of daunorubicin,doxorubicin,bleomycin,actinomycin D, etc.Streptomyces bacteriaInhibition of nucleotide synthesisPurinesThymineNucleotideTetrahydro-folateDihydrofolateReductaseFolic ... synthesisPurinesThymineNucleotideTetrahydro-folateDihydrofolateReductaseFolic acidInhibition byPurine antimetaboliteInsertion of incorrect building blocksPyrimidine antimetabolite6-Mercaptopurinefrom AzathioprineAdenineUracilCytarabine Cytosine CytosineDesoxyriboseinstead ... iodine-re-leasing agents like polyvinylpyrrolidone[povidone, PVP]-iodine as a depot form of the active principle iodine, instead of iodine tincture), cationic surfactants,and mixtures of these....